FIG. 5
FIG. 6
5–4 Monumenting the Survey: Section 10–35 of the Manual of Surveying Instructions, 1973 lists corner monuments in their order of preference.
Accessories to the corner generally consist of bearing trees or bearing rocks. If trees are available, two different species at approximately right angles from each other to the corner should, if possible, be selected and marked differently so that each can be readily identified. For example: one might be a Douglas Fir, 10 inches diameter, bears N. 10° E., 20.65 feet dist., blazed and scribed 1 W—2826 X BT; the other a Ponderosa Pine, 7 inches diameter, bears S. 70° E., 12.52 feet dist., blazed and marked X BT. In each case the measurement should be taken to the X which is in contrast to the bearing trees to section corners, the measurement being taken to the center of the trees. If the measurement is to the center of the tree, an X should not be included in the markings.
The difference between a pine, spruce and fir can be identified by the needles, the pine having needles in bundles, the spruce having needles square in cross section, and the fir having flat needles.
Bearing rocks should be marked X B O or X B R with the measurement taken to the X; the rock or outcrop being of sufficient size to be readily identifiable.
Ties along claim boundaries to items of planimetry and drainage surrounding the corner may be taken at this time. Ties to section corners, location monuments and triangulation stations may also be made at this time if they are close to a corner.
There is no objection to monumenting corners that fall on patented land. If they fall in a cultivated field they should be buried at least one foot in the ground. If the landowner objects, a witness corner may be set. Witness corners should also be set if the corner falls at an inaccessible point (see Section 4–17 of the Manual of Surveying Instructions). If the corner falls in a road, it is advisable to bury the corner at the true point and set reference monuments at equal distances on either side of the road (see Section 4–16 of the Manual of Surveying Instructions).